Table of notation used in Duffy's book
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Here's a table summarizing important notation of the book:
- Joseph Duffy. "Statics and Kinematics with Applications to Robotics". Cambridge University Press.
Note that, when referring to some concept, Duffy uses the notation in the column "Symbol", whereas when he refers to the coordinates of that concept, he uses the notation in the fourth column:
| Concept | Type | Symbol | Coordinates |
|---|---|---|---|
| line | geometric | $, $i, $ij | (ray), or (axis) |
| unit vector | geometric | ![]() | ![]() |
moment of wrt O | geometric | SO | SO |
| force | physical | w | ![]() |
| rotor | physical | t (ray) or T (axis) | (ray) or (axis) |





(ray), or
(axis)

(ray) or
(axis)